How to use

deserialize

method

in

org.apache.hadoop.hbase.errorhandling.ForeignException

} else {
 data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);
 ee = ForeignException.deserialize(data);

ee = ForeignException.deserialize(data);

/**
 * Verify that we get back similar stack trace information before an after serialization.
 */
@Test
public void testSimpleException() throws IOException {
 String data = "some bytes";
 ForeignException in = new ForeignException("SRC", new IllegalArgumentException(data));
 // check that we get the data back out
 ForeignException e = ForeignException.deserialize(ForeignException.serialize(srcName, in));
 assertNotNull(e);
 // now check that we get the right stack trace
 StackTraceElement elem = new StackTraceElement(this.getClass().toString(), "method", "file", 1);
 in.setStackTrace(new StackTraceElement[] { elem });
 e = ForeignException.deserialize(ForeignException.serialize(srcName, in));
 assertNotNull(e);
 assertEquals("Stack trace got corrupted", elem, e.getCause().getStackTrace()[0]);
 assertEquals("Got an unexpectedly long stack trace", 1, e.getCause().getStackTrace().length);
}

/**
 * Compare that a generic exception's stack trace has the same stack trace elements after
 * serialization and deserialization
 */
@Test
public void testRemoteFromLocal() throws IOException {
 String errorMsg = "some message";
 Exception generic = new Exception(errorMsg);
 generic.printStackTrace();
 assertTrue(generic.getMessage().contains(errorMsg));
 ForeignException e = ForeignException.deserialize(ForeignException.serialize(srcName, generic));
 assertArrayEquals("Local stack trace got corrupted", generic.getStackTrace(), e.getCause().getStackTrace());
 e.printStackTrace(); // should have ForeignException and source node in it.
 assertTrue(e.getCause().getCause() == null);
 // verify that original error message is present in Foreign exception message
 assertTrue(e.getCause().getMessage().contains(errorMsg));
}

} else {
 data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);
 ee = ForeignException.deserialize(data);

/**
 * Receive a notification and propagate it to the local coordinator
 * @param abortNode full znode path to the failed procedure information
 */
protected void abort(String abortNode) {
 String procName = ZKUtil.getNodeName(abortNode);
 ForeignException ee = null;
 try {
  byte[] data = ZKUtil.getData(zkProc.getWatcher(), abortNode);
  if (!ProtobufUtil.isPBMagicPrefix(data)) {
   LOG.warn("Got an error notification for op:" + abortNode
     + " but we can't read the information. Killing the procedure.");
   // we got a remote exception, but we can't describe it
   ee = new ForeignException(coordName, "Data in abort node is illegally formatted.  ignoring content.");
  } else {
   data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);
   ee = ForeignException.deserialize(data);
  }
 } catch (InvalidProtocolBufferException e) {
  LOG.warn("Got an error notification for op:" + abortNode
    + " but we can't read the information. Killing the procedure.");
  // we got a remote exception, but we can't describe it
  ee = new ForeignException(coordName, e);
 } catch (KeeperException e) {
  coordinator.rpcConnectionFailure("Failed to get data for abort node:" + abortNode
    + zkProc.getAbortZnode(), new IOException(e));
 }
 coordinator.abortProcedure(procName, ee);
}

/**
 * Verify that we get back similar stack trace information before an after serialization.
 */
@Test
public void testSimpleException() throws IOException {
 String data = "some bytes";
 ForeignException in = new ForeignException("SRC", new IllegalArgumentException(data));
 // check that we get the data back out
 ForeignException e = ForeignException.deserialize(ForeignException.serialize(srcName, in));
 assertNotNull(e);
 // now check that we get the right stack trace
 StackTraceElement elem = new StackTraceElement(this.getClass().toString(), "method", "file", 1);
 in.setStackTrace(new StackTraceElement[] { elem });
 e = ForeignException.deserialize(ForeignException.serialize(srcName, in));
 assertNotNull(e);
 assertEquals("Stack trace got corrupted", elem, e.getCause().getStackTrace()[0]);
 assertEquals("Got an unexpectedly long stack trace", 1, e.getCause().getStackTrace().length);
}

/**
 * Compare that a generic exception's stack trace has the same stack trace elements after
 * serialization and deserialization
 */
@Test
public void testRemoteFromLocal() throws IOException {
 String errorMsg = "some message";
 Exception generic = new Exception(errorMsg);
 generic.printStackTrace();
 assertTrue(generic.getMessage().contains(errorMsg));
 ForeignException e = ForeignException.deserialize(ForeignException.serialize(srcName, generic));
 assertArrayEquals("Local stack trace got corrupted", generic.getStackTrace(), e.getCause().getStackTrace());
 e.printStackTrace(); // should have ForeignException and source node in it.
 assertTrue(e.getCause().getCause() == null);
 // verify that original error message is present in Foreign exception message
 assertTrue(e.getCause().getMessage().contains(errorMsg));
}

ee = ForeignException.deserialize(data);

} else {
 data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);
 ee = ForeignException.deserialize(data);